skysight-inc/HackerNews huggingface dataset:
If you have been around for a sufficient number of tech cycles you already have conceptually analogous systems in your head, which you just have to remap to the new syntax. That's what makes a "senior".

The frontends are actually the hardest to stick with because they turn over fastest, probably followed by distributed-compute solutions. C# is a short walk from Java, SQL has been around for decades(even given dialect differences that change best practice).
I mean, assuming manipulative self-interested disingenuous behavior on the part of market makers and hedge funds on a daily basis is usually a safe bet. Also on the part of nearly anyone interacting with the stock market who has the power to do it. It's kind of the whole game. True, that may not be how they teach it to you in high school.
No one claimed that.
GameStop Bears Are Turning to the Options Market
>Why should Robinhood pick a winner (siding against their own customers)?

Because Robinhood's actual customer is Citadel, not the retail people making the trades.

Citadel gave $2.7BN to Melvin Capital a couple of days ago. It stands to lose that money if Melvin (and Citron etc.) can't fully cover their short positions.

A good way to make the stock price go down and allow Citadel to make money, is for RH to only allow selling and not buying of GME.

It's utterly appalling market manipulation.
It's really hard not to think that Twitter's timing had alot to do with their stock price. It's hard to boot the user driving the most engagement on your platform.
They kind of rolled it back now:

===

Effective immediately, the following conditions apply to these stocks:

No longer restricted to ‘closing only’ status; you now have the ability to buy and sell.

100% margin maintenance requirement.

No short sales allowed.
Ask HN: What do you do first when you start a new project idea?
I also remember a post on HN about Chris Granger's Lightable IDE?

http://lighttable.com/

https://www.chris-granger.com/lighttable/

Although as ground breaking, it does not seemt to have 'taken off' as much as it should?
Once again, the power of a phone call to the right person, asking for the right thing and offering the right compensation.
100% they're on margin. Otherwise the broker would have no right to make trades on their behalf.

In contrast, once you're on margin you give them the right to liquidate any part of your portfolio, at any time, to cover your margin balance.

What they can't do is liquidate beyond the margin balance. Once they've covered the balance they would have to stop closing out your positions.
It is called a margin call. Nothing specific to Robinhood or to GME.
I'd cool it on that analogy until you see 3. I bet it won't happen. (Arbitrary nesting needs a better UI)
Why couldn't you attach to the screen, press Ctrl-C, then press up arrow to get the original command?
Nothing criminal about it, brokerages do this all the time.
I wanted to use IB but the api was hideous, ended up going with Alpaca.
Looks like they just lifted it, with conditions*.
yes the are what?

#2: I completely agree.
You'd think there would be some stops in place like if a change will require an increase of more than X% over the initial planned budget it gets reviewed by some independent body that can say "no, that's dumb, stick to the original plan." Planners need some room for discretion and sometimes unforeseen issues arise, but you can't leave final decision making power in the hands of someone incapable of saying no to absurd requests.
Are you sure you didn't just have a margin call up to the margin maintenance rather than get everything on margin liquidated immediately like here?
People who write open source do it for analogous reasons, except the "strategic incentives" are often personal. Those reasons can change quickly when shiny new things appear. There's a wealth of abandoned OSS projects that illustrate this point.

Anyone working on Mesos these days?
This looks so cool! What's the significance of mebm? Nice to get such a short domain name.
They did that too
About 1/3 of Americans have a 401k. The RSU snipe was just for the orange website crowd.
Does anybody know: who is getting rich on this? What I mean, the short seller have to pay up a lot of money because of the squeeze, so who gets this money. Of course the entities who lend the stocks to them. Who is it specifically Goldman? (the guys from reddit just 'create' the squeeze, they are not getting a big chunk from the cake).
Not usable on mobile
>Apex is probably having trouble clearing these trades (given how one sided it is)

That's... not how stock markets work. For every buy there must be a seller. If there are too many buyers but not enough sellers the price simply goes up.
What? My point is that they see themselves as mall cops observing and reporting, not actively regulating behavior. That makes a pretty big difference in efficacy.
The difference here is they prevented people from starting new positions while still allowing closing them .. effectivly being the cause of the drop.
Schwab made GME non-marginable on 1/13. You can buy GME with your own settled cash on Schwab just fine. It has been tested.
Define "failing"
I mean, in a locker-room context, yeah, for sure, the externalities might be limited. At the same time, the comparison made there strikes as one oozing with value judgements. To be frank, I feel like the sentiments behind said value judgements would make the world a worse-off place.

I wouldn't want to contribute to a world where someone with mental disabilities feels like they're the indirect butt of someone else's joke. I feel like there's a way to be humble (and witty, likely!) without having to punch sideways.
Market makers aggregate their risk exposure across all of their holdings and put limits on how large those exposures get.

> Aren't these market makers sitting on a ton of stock to cover call positions?

The whole purpose of delta hedging is to make them immune to the first-order effects of market moves. The first-order derivative of the value of everything they hold with respect to price moves in any one stock is constantly kept near zero.

In the old days, many options traders would put off hedging their books until near the closing bell. Smart equities traders would watch the options market to see which way the traders would be rushing to hedge in the cash equities market. These days, there are systems that automatically hedge out the positions throughout the day.
Well, if you watched the M5M you won't really know about any of it. lol. Thanks for helping make my point!
Block has been lifted. We are back baby!
https://imgur.com/q7E5Dda
Good on the Alpaca team for changing their mind and doing the right thing.
The crazy rumors aside, at least this whole mess has clarified for me which brokerages to give my business to and which ones to boycott. It is the free market afterall, and people will be choosing with their $$$ which ones to support and which ones to boycott. The 1 star rating, while a bit extreme, also is part of the same idea.

You also kinda had it coming when you called yourself "robin hood" and then immediately bent over the moment the slightest challenge appeared.
I don't need the tab text on screen all the time, so while sometimes I'll pull up a tab sidebar I spend the vast majority of my time with a line of favicons and it doesn't make a significant difference where you put that line.
Optimally the result is Robin Hood is removed from the play and apple store for willfully defrauding their customers. Very real damages were suffered as a result of their willful actions. There was no warning and there was no way they did not know harm would come. Also if no retail traders could buy, who was buying the shares that they were forced to sell? If it was the short hedge funds, that has got to be a criminal conspiracy level charge.
I tried it and it was incredibly fiddly, the number of preferences bordering on ridiculous. I switched to Tree Tabs and so far liking it.
Here's an intereating tweet and the associated Reddit thread.

https://twitter.com/justinkan/status/1354853920762253315?s=2...

https://www.reddit.com/r/wallstreetbets/comments/l747eg/cita...

This seems, at first glance, to be clear and blatant market manipulation by Citadel and Robinhood.
Solana seems like a better fit for DeFi than ETH. It is also much higher performance, which is very important for DeFi.

Disclaimer: I don't hold solana or ETH.
The number of shares short is still the same as a week ago, about 70 million.
When you do it, it's the slippery slope logical fallacy. When I do it, it's logical induction, a necessary component of reasoning about the world.
The 70.87B reason why the Retail Brokers Just Betrayed Their Customers
:/ do we just sell?
Mechanisms of slab avalanche release and impact in the Dyatlov Pass incident
Maybe so, but please don't post unsubstantive comments to HN, and especially not ones that are personally provocative. It just makes discussion worse.

https://news.ycombinator.com/newsguidelines.html
>That would be securities fraud.

Naked shorting to drive down the price is also securities fraud. And yet...
> But they haven't sold databases, reverse proxies, and key/value stores, right? I've paid six-figure annual licenses to Oracle. Is that the world we're trying to preserve here?

Maybe? Why can't you sell a database, reverse proxies, or key/value stores? What if I want to start a business around a database, reverse proxies, or key/value stores? How does that work with FOSS?
Slightly off topic but can anyone explain to me why a massive company like coinbase uses Medium as a blogging platform/software? Why are they not hosting the blog within their own ecosystem/site?
All brokers are mandated to provide the legal terms of the account and margin accounts include language concerning a) the risks and b) what options the broker has available should your account fall below their required margin (which might be higher than the regulatory minimum).

Brokerage accounts, mortgages, credit cards are not click-thru agreements. There is real money involved and real risk to both parties. Not reading the terms before signing and using is an unacceptable excuse for future loss or hardship.
I think they can go elsewhere. If Citadel can't beat national best offer, they are supposed to go with the national best offer.

https://en.wikipedia.org/wiki/National_best_bid_and_offer
Can you become a DevOps engineer early or should you start off in Back end dev?
I wanna be able to work remotely from my country (Egypt) and I'm down to learn anything to speed up that process. I know some frontend and python, but that's about it. I quickly realized I have no interest in CSS and I'm more of a logic driven than creative person.

Which path would you choose?

1. Path 1 - [backend development](https://roadmap.sh/roadmaps/devops.png)

2. Path 2 - [devops](https://roadmap.sh/roadmaps/devops.png)

3. Path 3 - stick to frontend, learn react, and eventually be fullstack with a node.js backend

I have around a year to learn either one of these, so please guide me. I dont particulary prefer one over the other.
Where do you source the next earnings dates? From a quick skim some appears to be off.
what happened to all the people who supported banning trump?

“they’re a private company they can do whatever they want”

but now they want protection of users rights
What would success have looked like? Stealing the original copy of the constitution and using whiteout to change the bits they didn't like?
Citadel would never ever put themselves in a situation where they contractually have to assume an unpredictable level of risk
What if somebody sends you an email patch?
When you're providing safety critical equipment, records transparency and testing are critical expectations. In this case, human accidents are incredibly rare. You need on the order of millions of miles to verify that a particular system is statistically safer under similar conditions. A safety conscious company would have done the testing to be sure of this prior public release to non-experts (i.e. licensed drivers making test rides like every other SDC employs). Tesla recording only 12.2 miles means they either haven't done the requisite testing to be sure non-experts are safe, or are failing to report the results of that testing to the government.

Either one should be an immense red flag, regardless of what agreements they've gotten beta testers to sign.
Rumor mill says that the White House and Sequoia called RH to force their hand. Honestly, I wouldn't expect anything less. I say this because 2% drawdown of the stock market didn't happen for zero reason. It happened because these fools are leveraged up to their ass (metaphor) and the bet cost them severely. And it's cheaper to take the bad PR while salvaging your fuck up. These people act in a different set of rules and that's not okay.

IMHO, I'm concerned about this because this is a 1st amendment problem. Let grown adults gamble. Let them be responsible for their dumb actions (hedge and retail alike). If someone is 'too big to fail' then they are 'too big to exist'.
I want in the lawsuit for blocking the ability to purchase stock. This is not fair to small investors that may want a long position.
In that case, I might assume that the website uses white/gray stars instead of yellow ones to denote a higher score.
Only to return information about the effect's success, which would again make it easy to see that the function must have some effect, if all it returns be true or false or another trivial value that could be constructed from æther.
What's out their right now in the way of crypt infra for securities / stock trading?

I predict that as the news digests GAMESTONKS, we're gonna see a decent amount of talk about crypto and a block-chain based stock market.

But I'm far out of the crypto loop these days so IDK what the contenders are.
College from home has been a spectacular failure as well
Url changed from https://simon-moxon.medium.com/employers-will-have-no-choice..., which points to this.
Yes, a Stock Can Have Short Interest over 100% – Here's How
humans tend to love lists of things that give ranking of things. So its going to get people clicking on it. But the actual lists don't really tell you anything. At best these kinds of things are more interesting when they track trends year in year out comparing its own data. But even that isn't terribly useful unless theres some big shifts. Certainly announcing the things on the list as "winners" is silly, all this is is a marketing effort for stackshare, which is fine, but its just not terribly useful.
We needed to put more people at risk because we couldn’t prove that they would get sick?
You know, you might be right. Last time I had a margin call was a long time ago. Then again, I don't recall ever trading a stock on margin that swings 100% either direction in one day.

Speaking of margin calls, a brokerage usually gives you the courtesy call saying, "either you liquidate (or give us more money to cover), or we'll do it for you", but on GME I could see skipping that call given the volatility.
SPY did not have a 50% drawdown and reversal in 30 minutes time

GME did
I searched a bunch of the symbols from the top of the list. Basically any outside of well known GME, AMC, BB, NAKD, NOK, it's all just false positives.
https://github.com/malgamves/CommunityWriterPrograms
It's not the "wrong" version. It's the original version, as per when they quoted it. There's really no other way it could work.

When you quote someone, you repeat what they said, not what they might repeat some time in the future. When you quote a book, you write down what's written in the book. Not what the author writes in the next edition.

You may in time edit/remove/amend your tweet to comment on further changes.
> Melvin doesn't have a short position anymore.

Untrue, the number of shares short is still 70 million. Nothing changed.
Espresso trucks/vans seemed to be a big thing in the EU when I lived there, but don't seem to have much of a place in the US. Maybe it's due to the low walkability of the US and tendency to travel via car? Or maybe it's hard to get the licensing for it?
Exactly, I just wrote a blog post about how I do that, basically with shell scripts in the repo with lots of small functions. They basically form an annotated log of what I did, so I never have to remember long commands.

I can't remember long commands so I always write them down.

Examples of using a JSON API, using a C++ tool uftrace, and hacking on Kernighan's awk:

Shell Scripts Are Executable Documentation http://www.oilshell.org/blog/2021/01/shell-doc.html

Admittely there are a lot of people who don't seem to like reading shell scripts as docs. But you don't really have to read the code -- you just read the function names.

I also added doc comments to Oil, like this:

deploy() {
### doc comment
cp foo bar
}

which you can access with the 'pp' builtin. So eventually those strings could be exposed to autocomplete, etc.

http://www.oilshell.org/blog/2020/11/more-syntax.html
In various avenues where it commonly appears (guns, gay marriage, speech, privacy, etc) it's particularly unhelpful because the US typically lags other western nations on this stuff.

So an opposition that relies on "what if" scenarios to oppose progressive change is often one which is either unaware-of or has explicitly looked at other nations that are 10-50 years ahead on whatever the policy is, and discovered that enacting step X did not, in fact, lead to a downward spiral into nightmare scenario Y.
I think this is a reasonable attempt at "what RH did was right", although I'd certainly be happier if the timing and coordinating were brought to light:

https://www.bloomberg.com/opinion/articles/2021-01-28/robinh...
Yeah, fuck the stock market at this point.
That's great, but they should be halting trade of the stock all together if they really believed retailers were manipulating the stock.

I can see the nice narrative of allowing retailers to sell ("capture gains"), but it's indefensible to only allow selling.

That's _blatant_ market manipulation.
Who was actually buying the shares once retail buys were halted? Was it the short hedge funds? If so, then was this not a conspiracy to allow them to cover their shorts and initiate new ones knowing the price was going to be artificially forced to lower?
Never going to happen as long as people insist that stuff works on their walled-garden cellphone.

Cellphone lockdowns are the keystone here.

There are sensible arguments for cellphones being walled gardens (grandmas can't defend their phone against malware, etc), but this is the devil's bargain you have to accept.

As long as people (a) want everything on their cellphone and (b) want it to be locked-down enough that they can trust it to not listen in on them and stalk their location, everything downstream of the cellphone will be intermediated.
A margin call on a stock you halted trading in smells like fraud.

It’s like the bank banning selling your home then repossessing it when the value falls.

Crooked entirely.
At this rate, they will red pill everyone with a pulse. It's a good thing (/s alert) that we have legislative solution in the pipeline just in time to address the inevitable social consequences.
Ok, we've changed the URL above from https://simon-moxon.medium.com/employers-will-have-no-choice... to a (more recent) article about the YouGov poll.
Trendiness.
J.F.C.
I honestly didn't read the agreements on Robinhood. Before you call me stupid or irresponsible, I'm going to say practically no one reads these agreements, and even fewer understand them.

The NYT a few days ago had an opinion piece on how no one reads the TOS for things like this. A very choice line:

> A 2012 Carnegie Mellon study found that the average American would have to devote 76 work days just to read over tech companies’ policies. That number would probably be much higher today.

https://www.nytimes.com/2021/01/23/opinion/sunday/online-ter...

When I bought my house, the attorneys sat down with me and had me read through and explained to me every single term of the purchase agreement and my mortgage, checking that I understood them. Absolutely no one has done this for Facebook, throwing a few hundred into Robinhood, etc. It's not worth it, and the terms change with such frequency that it would be outdated immediately.

I don't think having such impossible terms that you "agree" to are in good faith.

I'm not ignorant, I'm pretty typical, and I'm not going to spend 1/3 of my time simply sitting reading TOS.
> My understanding is that that vote is largely procedural and that the losing side voting against it as a protest is common in every election

No. The only times prior to 2021 that an objection in proper form to trigger a debate and vote on any state’s submitted electoral votes since the modern process was adopted in 1887 were in 2005 and 1969 (the latter over a faithless elector), both addressing only a single state, and the 2005 example was explicitly stated to be an effort to draw attention to electoral system issues rather than alter the outcome; there weren't members who voted for it stating on national TV the expectation that who would be President was in doubt based on the action the way, e.g., Sen. Hawley did in regard to the challenges this month.
Plagiarism isn't tolerable. I looked at your post, compared it to this Business Insider article (https://www.businessinsider.com/jack-mas-ant-group-plans-shr...), saw that it was clearly plagiarized. Result? I flagged this second post of yours just now.
Truck-Mounted Robot Arm Builds Structures Straight from CAD File
I'd say do both, actually. But versioning is more important IMO because it gives you the freedom to potentially start from scratch keeping only a small portion of the header.

On mainstream file formats... It's a mixed bag. Image formats — JPEG and PNG especially — are extensible and reasonably easy to parse. It's fairly trivial to get the image dimensions out of one of these without decoding the compressed data. I did as well write a JPEG decoder out of curiosity once to understand the compression algorithm better — it's an interesting exercise, really, every software developer should try it at some point.

But the worst format I've ever worked with is MP3. It's an absolute mess. First, there are two kinds of ID3 tags. These store metadata that your player displays. ID3v1 is a fixed-length, fixed-layout thing that goes on the end of the file. ID3v2 is an extensible, I'd say way too extensible, chunked thing capable of storing literally anything, including jpegs of cover arts, that goes on the beginning of the file. But none of them store the duration of the file. You're supposed to chop the tags off the ends of it, then find the first frame of encoded data by searching for the pattern 0xFFFx, read its header, and determine the byte length, bitrate, the sampling rate and ultimately the duration of a that frame using several lookup tables. Now that you know how much audio each frame contains, and how long it is, you take the size of the file (minus tags of course) and divide it by the frame length, then multiply by the frame duration. That's how you get the duration of an MP3. A constant-bitrate one. And to seek within an MP3, you calculate the offset into the file and round it to the nearest frame size and just start playing from there. It gets even worse with VBR, because now you can no longer rely on frames being the same byte length, but I don't really remember the details any more. The gist of it is that there's "header" encoded into the very first frame in the file, and there are two kinds of these headers, and there's a sort of lookup table in it, among other things, to help you seek into the right part of the file because the byte offsets don't linearly correspond to the playback time in a VBR file. After you seek, you have to go back and forth to find the 0xFFFx and play from there. Or not, because sometimes there's a 0xFFFx in the middle of a frame too, so you have to have some heuristics to detect that it's the real one.
"Manipulated by an angry mob" is one way to look at it, but "unsophisticated investors attempting to short squeeze billion dollar hedge funds" is another.